Lamp bulb



FIG. 1 is a front elevational view of a lamp bulb showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is an enlarged sectional view taken along line A—A in FIG. 1; and,

FIG. 8 is an enlarged front elevational view thereof showing the lamp bulb when in use with an outer bulb.

The outer bulb and electrical connectors to the lamp bulb shown in FIG. 8 are hereby disclaimed and form no part of the claimed invention. 

The ornamental design for lamp bulb, as shown and described. 